The Harvard Dry Gas Meter is a positive-displacement volumetric measuring device used to accurately quantify the volume of expired or collected gases (e.g., via Douglas bags). It is widely used in respiratory physiology and energy metabolism laboratories.
Device body: Robust, equipped with an internal membrane (diaphragm) that moves proportionally to the gas volume.
Connections: Inlets and outlets adapted for standard tubing (22 mm and 30 mm).
Digital display (LED): 4-digit screen, displays in 0.1 L increments, range from 0.1 to 999.9 L, featuring a RESET button for zeroing.
Pulse output (TTL): Generates a 5V pulse for every 0.1 L measured, enabling connection to a data acquisition system.
Accuracy: Approx. ±1.5%.
Measurement Range: 0.1 L up to 999.9 L.
Operating Principle: Volumetric measurement by positive displacement of the diaphragm.
9V battery (included) for standalone operation.
5V Micro-USB port for external power and charging.
Dimensions: approx. 20 × 22 × 37 cm.
Weight: approx. 4.05 kg.
Display with adjustable contrast.
LED indicator showing battery charge status.
Compatibility with gas collection and analysis systems (Douglas Bag, metabolic carts).